A Level

MATHEMATICS · Multi-part · A Level · Mathematics · Trigonometry · Trigonometry

Problem

Let θ=28∘\theta = 28^{\circ}. (i) Calculate sin⁡(90∘−θ)\sin(90^{\circ}-\theta) correct to four decimal places. (ii) Using your answer to part (i), determine cos⁡θ\cos \theta to the same degree of accuracy. (iii) Hence find tan⁡θ\tan \theta correct to four decimal places.

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